The club have reached a mutual agreement to prematurely terminate the loan deal of Watford midfielder Diego Fabbrini.

The Italian originally joined Aitor Karanka's side on a season-long deal in July 2015, and he will now join Birmingham City on a permanent transfer from Watford.

Fabbrini has made 26 appearances for Boro this season, scoring six goals.

His last goal in a Boro shirt came in his final appearance for the club, in the FA Cup defeat to Burnley at the Riverside on January 9.